Copenhagen Atomics

Thesis

Copenhagen Atomics is the most advanced Western developer of thorium molten salt reactors (MSRs). The company has built two full-size non-fission prototypes and is planning a critical experiment at Paul Scherrer Institute in 2026-2027. The first European thorium MSR critical experiment ever. Commercial reactors are targeted for the early 2030s. Thorium MSRs represent a fundamentally different nuclear model. Thorium is 3-4x more abundant than uranium, MSRs operate at atmospheric pressure (eliminating meltdown risk), and the waste profile is dramatically better than conventional fission. If the technology works at scale, it could open safe, abundant nuclear energy without the waste and proliferation concerns of uranium-based systems. The company has raised over 25M EUR, with shares traded secondarily. The critical experiment at Paul Scherrer Institute is the single most important near-term catalyst. A successful result would validate the core physics and could trigger a major fundraising round. Risks are substantial. Nuclear regulatory timelines are measured in decades, thorium MSR materials science (corrosion resistance for molten salt containment) is unsolved at commercial scale, and the company is competing against a global fission industry that has no interest in model shifts.

Catalysts

• +Critical experiment at Paul Scherrer Institute planned 2026-2027. First European thorium MSR test
• +Two full-size non-fission prototypes already built
• +Thorium MSRs address nuclear waste, safety, and proliferation concerns simultaneously

Risks

• -Nuclear regulatory timelines measured in decades. Commercial reactors not until early 2030s
• -Molten salt corrosion resistance at commercial scale is an unsolved materials science problem
• -Private company with limited liquidity. Shares only traded secondarily

Common questions